Discoxenus kakizoei, Kanao, Taisuke & Maruyama, Munetoshi, 2015

Kanao, Taisuke & Maruyama, Munetoshi, 2015, Eight new species, a new record, and redescription of the genus Discoxenus Wasmann, 1904: The first record of termitophilous rove beetles in Cambodia (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 4044 (2), pp. 201-223 : 218-219

publication ID

https://doi.org/ 10.11646/zootaxa.4044.2.2

publication LSID

lsid:zoobank.org:pub:7000893A-A8BC-4196-B76D-385C97B96FBD

DOI

https://doi.org/10.5281/zenodo.6111791

persistent identifier

https://treatment.plazi.org/id/0395F739-FFB4-BF37-FF02-18A8FCF3BF5D

treatment provided by

Plazi

scientific name

Discoxenus kakizoei
status

sp. nov.

Discoxenus kakizoei View in CoL n. sp.

( Figs. 15, 16 View FIGURES 13 – 18 , 137–148 View FIGURES 137 – 148 )

Type materials. Holotype: ♀, Bayon, Ankor Thom, Siem Reap, Cambodia, 20 VIII 2012, Maruyama M. leg. (Colony no. MMCB-T-2012-2-009) (abdominal segments VIII–X dissected off).

Paratypes: 1♀, North Wall of Preah Khan, Siem Reap, Cambodia, 19 VIII 2012, Maruyama M. leg. (Colony no. MMCB-T-2012-2-005) (completely dissected). 2♀♀, 0.76 km NE of Preah Kham, Siem Reap, 19 VIII 2014, Kakizoe S. leg. (Colony no. SK007).

Diagnosis. This species is distinct, and is distinguishable from other Discoxenus species by a combination of the following three character states: right mandible with a distinct and blunt tooth ( Fig. 141 View FIGURES 137 – 148 ), macrochaetotaxy of abdominal tergites III–VIII (6, 6, 6, 6, 6, 6), and spermatheca with the basal part being shorter than the apical part ( Fig. 148 View FIGURES 137 – 148 ).

Description. Head ( Fig. 137 View FIGURES 137 – 148 ) approximately 1.4 times wider than long. Antenna ( Figs. 15, 16 View FIGURES 13 – 18 , 138 View FIGURES 137 – 148 ) with segment I rectangular; segment II as long as segment III, with 4 macrosetae; segment III short, trapezoidal; segment IV transverse, wider than other segments; segments V–XI successively narrowed distally; segments V– VI wider than long; segment VII subquadrate; segments VIII–X longer than wide; segment XI approximately 2.6 times longer than wide. Labrum ( Fig. 139 View FIGURES 137 – 148 , left side) with anterior margin deeply concave at middle; median projection of apodeme with posterior margin truncate; 3 lateral setae present in ventral view ( Fig. 139 View FIGURES 137 – 148 , right side). Mandibles ( Figs. 140, 141 View FIGURES 137 – 148 ), covered with 30–40 pores. Left mandible ( Fig. 140 View FIGURES 137 – 148 ) with adoral margin moderately convex at apical third. Right mandible ( Fig. 141 View FIGURES 137 – 148 ) with a tooth broadly convex at middle of adoral margin, rounded apically. Maxillary palpal segment III approximately 2.3 times longer than wide. Mentum ( Fig. 142 View FIGURES 137 – 148 ) approximately 3 times wider than long, covered with around 50 pores. Labium with prementum covered with approximately 16 pores.

Pronotum ( Fig. 143 View FIGURES 137 – 148 ) covered with approximately 44 macrosetae, 6 minute setae present around anterior margin. Elytron ( Fig. 144 View FIGURES 137 – 148 ) transverse, sparsely covered with several setae at anterolateral outer corner, 12 macrosetae present on disc. Metaventrite approximately 1.7 times as long as mesoventrite.

Tergites III–VI ( Fig. 15 View FIGURES 13 – 18 ) with 1–2 setae laterally. Tergite VII with a row of 5–6 setae subapically. Tergite VIII ( Fig. 145 View FIGURES 137 – 148 ) with posterior margin pointed, 3 pairs of macrosetae present at posterior margin, with 2 pairs of macrosetae around middle. Macrochaetotaxy of abdominal tergites III–VIII = 6, 6, 6, 6, 6, 6. Sternite III ( Fig. 16 View FIGURES 13 – 18 ) with posterior half densely covered with setae. Sternites IV–V with posterior half sparsely covered with setae. Sternites VI–VII with a row of yellow setae at middle. Sternites III–VII with 6–10 macrosetae at posterior margin.

Male. Unknown.

Female. Sternite VIII ( Fig. 146 View FIGURES 137 – 148 ) with 2 pairs of macrosetae at posterior margin and middle. Spermatheca ( Fig. 148 View FIGURES 137 – 148 ) with apical part longer than basal part.

Measurement. Body length = average 1.82 mm (N = 1), pronotal length = average 0.60 mm (0.58–0.62 mm, N = 2), pronotal width = average 0.85 mm (0.83–0.86 mm, N = 2), elytral length = average 0.44 mm (0.43–0.45 mm, N = 2), elytral width = average 0.50 mm (0.49–0.51 mm, N = 2.

Etymology. The specific epithet is named after Mr. Shotaro Kakizoe of Kyushu University, who collected and kindly provided the specimens of this rare species.

Host species. Hypotermes makhamensis Ahmad, 1965 .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

SubFamily

Aleocharinae

Genus

Discoxenus

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